Internal-combustion engine.



T. P. BROUKE. INTERNAL coMBusnoN ENGINE APPLICATiON FILED PUG.5,19H.

Patented Sept, 5, 1916.

2 SHRETS--SHEET i.

@fa/Wg. y

T. P. BROOKE.

INTERNAL coMBusTIoN ENGI APPLICATION FILED AUG.5,I9I1.

Putentedbept. 5, 1916.

2 SHEETSSHEET 2 En 'sirens THOMAS vP. BROOKE, on CHICAGO,LLINo'IlSy-.ssilenon BY MESNE ASSIGNMENTS, on"v ONE-FOURTH'TO FRAEJKLINA. UMSTED, o? CHICAGO, ILLINOIS.

I'NTEnnAL-CMB'Us-Hon ENGINE.

Application filed Au'g'ust 5, 19H. Serial No. 642,556.

Be it. known-that L' THoMss P. BROOKE.

eitizen of the. United States, residingat Chicago.; county-0f Cook, undStetefnfilhnois, have invented certain new and ise'ul Improvements inInternal-Combustion Ein. Y ginesnof which the following isafull, elem',-

this type in which thefvnlves .shall oe-posi-- tively controlled .by a'regularly part 'of the engine;

The invent-ion consists in the features-.of nmelty. in the construction,combina-tion- .:ind arrangement ofpzufts shown in the :rc-

moving eompunying drawings. destrihed 'in the'.- particulnrly pointedout.

specification, and in theeluiins.. f A

In the said cli-linings which show annex nmpleof thevinrention, Figure lisfan 'axial elevutnin -of nn engine embodyingthis in- Ventron, pnrtly'in section on a plaine extend-Y ing longitudinally of one o f thecylinders; Fig. 2- is .nn enlarged de-tail sectionzii View of lthe vi-lve .ineelninism and *'ussoeitid parts; Fig. 3 is finothex'f sectionalviewtheieof teken on the .irregular line Fig. Fig. -is :i section :itright :ingles to the pleine of 'thesecftion o Fig. 2,-011 the iine i-'J'Fig. 3; Fig. 5 is a section on the l-i'ne r J the line Af- G Aneiigine'nf` the-same general type.' to

filed .flirtoher Zeitln 1910.

Specification of Letters ,Yatent Fig. 2, and Fifi'. 6 is n detailser-.tion on' Patented sepas, 1916.

1 immovable with rela-tion to the shaft 9, and

constituting the center-"about whiehall the-'- pistons'lS und theirpiston rods sui-'ing while' the cylinders revolve vabout the shaft 9 as'their common center, thereby msltingiin zii' 60 rela-.tivelyreciprocating moi-'ement of piston and cylinder. The outer ends of thekzylin- "g deis may be provided with exhaust valves 5 lei, controlledmeans well known-inthe art, orin any suitable vWay, not necessary to 65ilius rate, and this end oli-the cylinder may also he provided with :inigniter l5. inthe heard orend of the pistonis-securedi'. vnlye engeembodying n valve seat '16, in"

.which is formed' n spider 17 eonstitutingn v70 guide for the ste-1n.lSof valve 19, the lstein f "raving a flange 20 secured toor.-frin'ecl"`` thereon 'for the support ofthe spring 21, `f whichserres to keep the valve-closed while starting. This 'vnlrell isE nuintake vlv'egund serves t(,-.0ntr0l the. intke; port in tli lie-:id of.the piston in which tl1e,\'alvesat 1C is secured. 'llheeoinbustible'mixture or-f' other. lluideement for-making tlie-` elxaige is ndniittedfirst-to the crnnkgc'nse 8 tlirou'gli A8'() any suitable passage,notiieeessarytoillus-1 l' Ytrzr 'tively inn-'zuid movement:- -ernnkCnseescapes through theintake p" -in the piston head past-'thevnlfvelf); and bef 35 comes eutrapped between, the .InSt'On'VaHdff'-outer-cnd of tl'reeylinder when thefpist'on -nnd voylinder malte a'relatively approach-*- 'ing movement neeording tov tiie'well kiioivnprincipleo the 'four stroke cycle interinale-Y0 eenibustioli engine. f3n Vmy former application-I have shown und described Weights arrangedtoact'upon the rali-'e 19 in order' to counter-ba-lnee"the.' ficentrifugal force generated in the vali-'eby the revolving movement ofthe cylinders und Apistons. Similar weights arealsoemployedY whichthisniuefent-iori isnpplied eonstitixtesjA the subject m'ntter of theclaims in my e0; .5 @endingapplication, Serial Nunaher- Generally speel`n the saine einb'oc'iies n iplurality of re.`

levers 24 Apivoted jon pins 25, .and nrrnngefl'- '10ci -o engage iheflange 20? so that the cen'trifi u iure-.e generated in the weightsZ2-23 Cause heurte :nove outwardly, und *hei-elif induce ther-inner endsof. the levers te pull the i'zilfe if? torvnrd'its-seat and'lO @verveineif. Centrifugal force generated in the valve. the valve heimr opened inmy 'former invention hy tne difference in iospherie pressure created onopposite des of. the vpiston head due to theV dis` '11 placement of thefluid contents of the cylinder by the relative movement of piston andcylinder; or by the force of the compressed fluid in crank case;' but inpractice it is found that something more positive than this force isrequired for inducing the valve to unseat at the proper time. To thatend,l

the valve, according to this invention, is provided with meanspositively operated from a regularly moving part of the engine, forsubjecting it to a requisite degree of force at the proper time forunseating it and relievingr it of this force at the time when it shouldclose or commence to Close. Specifically, the devices which have beenadoptcd for this purpose consist of a weight so related to the valvethat the centrifugal force generated in the weight will be imposed uponthe valve during the period the valve should be open, and a cam ormoving member connected with the piston rod for pulling the weightinward when it is time for the valve to close. This weight is in theform of a yoke having three branches 27- 28-29, constituting asubstantially U- shaped member, the branches 27-28 of which projectoutwardly through suitable guide passages 30 in the spider 17 of thevalve cage, whereby the outer ends of these branches will be guidedWhile making their recprocatory movements toward and from the inner faceof the valve. When not otherwise restrained during the operation of theengine, the centrifugal force generated in the weight 27-2829 is thusimposed upon the valve, and it is thereby forced from its seat. When itis time for the valve to close the weight is moved in the oppositedirection by a cam 31, connected with the piston rod 12, in such a wayas to receive la rocking action therefrom and cause it to impingeagainst the branch 2f) of the weight in the manner shown in Fig. 3. Thisca-m is also provided with side flanges 32, which engage with the sidesof branches 28-29 for holding the inner end of the weight 27- 253-29against movement transverse to the plane of oscillation of cam 31, whilemovement parallel with the plane of oscillation of cam 31 is preventedby the curved face 33 of the cam engaging branch 28, and the hub 34 ofthe cani engaging branch 27, also by the guides 30. The cam 33 isrigidly secured to the piston rod 12. This is acomplished by any.suitable expedient. The. hub 34 of the cam is embraced by two branches35 of the piston rod. l2, and brazed or otherwise secured thereto. Thishub is journaled upon a gudgcon pin or pivot 3G, rigidly secured at itsends in two hangers 37, depending from Athc sides of the *valve seatmember 16.

These 4hangers 37 are provided with openings 38, thizough which thelevers 24 project, and in which the pivots 26 are situated.

In the operationpf the engine it will, of

course, be understood that as the cylinders and pistons revolve aboutdifferent centers, the angular relation of the piston rods and cylindersis continually changing, and thereby resulting in a rocking action ofthe cam 31 in each cylinder with relation to its weight 27-28--29, andthe cam is so proportioned and arranged with relation to the parts bywhich it is operated and those upon which it operates that it willrecede from the branch `29 of the weight when the piston starts itsstroke relatively toward the center 9, and in a four cycle engine,althou h this stroke occurs twice during each cyc e, the valve will beforced open only during the suction stroke, because during the otherstroke it is held to its seat by the force of the explosion; and as thesuction stroke is completed, or about to be completed, the piston beingat or near the extremity of its stroke toward the center 9, the cam 31comes against branch 29 and relieves the valve of the weight 27-28-29,permitting it to be closed by the spring 21, or by the centrifugal forceacting on the counter-Weight.

I claim: y

1. In an internal combustion engine, the combination of a plurality ofcylinders revolving about a common center, a plurality of pistons forsaid cylinders respectively re-v volving about a different center,valves for controlling they fiuid contents of said cylinders revolvingtherewith, and counter weighted to resist the tendency of thecentrifugal force generated therein to open them, a piston rod connectedwith each of saidl pistons and adapted to oscillate with relationthereto as the cylinders and pistons revolve, a weight movableindependently of the valve in each cylinder for aiding in the unseatingof the valve, and a projection connected with said piston rod andarrange-d to engage and control said Weight to relieve the valve of theforce thereof during the compression Stroke of the piston.

2. The combination of an internal combustion engine having revolvingcylinders and reciprocable valvedY pistons with oscillating piston rods,of a yoke member operatively related to each piston valve, and a cammember fixed to oscillate with the piston rodand adapted to engage theyoke to positively close the valve during the outward movement of thepiston. I

3. An internal combustion engine having a revolving cylinder, areciprocating valved piston and an oscillating piston rod, a yokeoperatively related to the valve, a, cam moved with the piston rod toclose the valve during the outward movement of the piston, and pivotedcounterweights to engage and balance the valve during its outwardInovement.

4. An internal combustionv engine having a revolving cylinder, areciprocating valved piston uml un oscillating piton :'ml, :x )foliooperatively related lo the volw. n fum moved with the piston rml to lowthe wlmi: during the outward mm'lmml of tlnpwonl pivotel Countelwvoglltlo lmlmuo llw wlw only during its outward mowmvnl. :nul :l Seatingspring for H10 vulva l 5. In :un internal (wmlmhifmy n.m- 31ming :lrevolving c ylilnlur. :1 xlw'ino'vnting vnlved piston uml 1n o -villning@Non roll. the cmubnzltion of :l yolvf opcxxwljf: Vulated t0 the vulve,a flung@ #emu-ml lo tlm valve stem, counterwelgzlits lfotml in ilu:valve adapted to engage the. lmzgo :zml im?- :mw the vulve only duringits inwm'xl mow4 mvnt. nml :l cum Secured to uml movable will] vthepiston rod as it osvillntcs lo posi l'wly (flow the Valve only duringtlm out- 'mml mowmvnt of the piston ln the cylmlm'.

In tcatimony whercof l have Signml my :mmv lo ll'eis specification. intho pren-cnw of lwo sullsl-x-ilring witnesses, on this lul luy ol).r\"lf 1'l1 l` l). lflll.

' THOMAS I. lllUUKl.

CHARLES ll. Smm, Fmxnxs A. lloPKINS.

